What the vulnerability does
01Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in themifyme Themify Popup themify-popup allows Stored XSS.This issue affects Themify Popup: from n/a through <= 1.4.2.
Explanation of Vulnerability in Simple Terms
02Summary
Themify Popup versions 1.4.2 and earlier contain a cross-site scripting (XSS) vulnerability that allows authenticated users to inject malicious scripts. An attacker with low-level site access can craft a popup that executes JavaScript in other users' browsers when they view the affected page. The vulnerability requires user interaction and can affect multiple users across the site.
What an attacker can do
03Attacker Capabilities
Inject JavaScript code that runs in other users' browsers when they view a popup.
Potential impact on your site
04Site Impact
Authenticated attackers can steal session cookies, redirect users, or deface popup content affecting your site visitors.
Conditions required to exploit
05Prerequisites
Attacker must have low-level site access (e.g., contributor or subscriber role) and the victim must view the affected popup.
Key dates
06Disclosure timeline
September 5, 2025
CVE published
May 13, 2026
Record updated